HELP! Jailbroken iPhone 4 wont restore (error 21)

royalewithcheez

macrumors newbie
Original poster
Aug 26, 2012
7
0
I tried to update my 4.2.1 jailbroken iPhone 4 to 5.1.1, but when I try to do the restore I get error 21. This is very annoying as iPhone is stuck on the "connect to iTunes" screen and is not usable. Please help.